diff --git a/vagrant/codelabs/codelab-04/requirements.txt b/vagrant/codelabs/codelab-04/requirements.txt
index 7a249fb..565ef05 100644
--- a/vagrant/codelabs/codelab-04/requirements.txt
+++ b/vagrant/codelabs/codelab-04/requirements.txt
@@ -13,7 +13,7 @@ pyasn1==0.3.7
 pycodestyle==2.3.1
 pyflakes==1.5.0
 python-dateutil==2.6.1
-PyYAML==3.12
+PyYAML==5.4
 rsa==3.4.2
 s3transfer==0.1.11
 six==1.11.0